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import { throwError, isNodePattern } from "@jimp/utils";
import Resize from "./modules/resize";
import Resize2 from "./modules/resize2";
export default () => ({
constants: {
RESIZE_NEAREST_NEIGHBOR: "nearestNeighbor",
RESIZE_BILINEAR: "bilinearInterpolation",
RESIZE_BICUBIC: "bicubicInterpolation",
RESIZE_HERMITE: "hermiteInterpolation",
RESIZE_BEZIER: "bezierInterpolation",
},
class: {
/**
* Resizes the image to a set width and height using a 2-pass bilinear algorithm
* @param {number} w the width to resize the image to (or Jimp.AUTO)
* @param {number} h the height to resize the image to (or Jimp.AUTO)
* @param {string} mode (optional) a scaling method (e.g. Jimp.RESIZE_BEZIER)
* @param {function(Error, Jimp)} cb (optional) a callback for when complete
* @returns {Jimp} this for chaining of methods
*/
resize(w, h, mode, cb) {
if (typeof w !== "number" || typeof h !== "number") {
return throwError.call(this, "w and h must be numbers", cb);
}
if (typeof mode === "function" && typeof cb === "undefined") {
cb = mode;
mode = null;
}
if (w === this.constructor.AUTO && h === this.constructor.AUTO) {
return throwError.call(this, "w and h cannot both be set to auto", cb);
}
if (w === this.constructor.AUTO) {
w = this.bitmap.width * (h / this.bitmap.height);
}
if (h === this.constructor.AUTO) {
h = this.bitmap.height * (w / this.bitmap.width);
}
if (w < 0 || h < 0) {
return throwError.call(this, "w and h must be positive numbers", cb);
}
// round inputs
w = Math.round(w) || 1;
h = Math.round(h) || 1;
if (typeof Resize2[mode] === "function") {
const dst = {
data: Buffer.alloc(w * h * 4),
width: w,
height: h,
};
Resize2[mode](this.bitmap, dst);
this.bitmap = dst;
} else {
const image = this;
const resize = new Resize(
this.bitmap.width,
this.bitmap.height,
w,
h,
true,
true,
(buffer) => {
image.bitmap.data = Buffer.from(buffer);
image.bitmap.width = w;
image.bitmap.height = h;
}
);
resize.resize(this.bitmap.data);
}
if (isNodePattern(cb)) {
cb.call(this, null, this);
}
return this;
},
},
});